kevward

Defensive server hardening & patch automation for Ubuntu.

kevward runs on a server and answers three questions a sysadmin asks every morning:

1. What on this box is vulnerable or out of date? — pending security updates and minor upgrades for the base system (apt), web servers (nginx, Apache), databases (MySQL, MariaDB, PostgreSQL, Redis) and php/openssh/ufw, plus dependency advisories for Composer/Laravel, Node.js/npm and WordPress.
2. Who is attacking me? — a time-ordered view of banned / probing source IPs from fail2ban and sshd auth logs.
3. Of everything being exploited in the wild right now, does any of it apply to me? — cross-references the CISA KEV catalog (known actively-exploited CVEs) against software detected on the host.

It can report, and — only when you explicitly opt in — apply security patches and schedule a reboot inside a maintenance window.

Scope: this is a defensive tool. It only inspects and patches the host it runs on. It contains no capability to scan, access, or act against any remote system, and none will be accepted. "Active defense" here means staying ahead of attackers on your own infrastructure — not hacking back, which in Japan remains restricted to designated authorities under the 2026 サイバー対処能力強化法 and is otherwise an offence under the 不正アクセス禁止法.

Install

git clone https://github.com/ForexRobotics/kevward
cd kevward
pip install .            # or: pipx install .

Requires Python 3.10+ (Ubuntu 22.04 and newer). The only dependency is tomli, and only on Python 3.10 — on 3.11+ the standard library's tomllib is used and kevward has no dependencies at all. Optional host tools are detected at runtime: apt, composer, npm, wp (wp-cli), fail2ban, logwatch.

To make kevward available to root (needed for report/apply) when installed in a virtualenv, symlink it onto the system path:

sudo python3 -m venv /opt/kevward
sudo /opt/kevward/bin/pip install .
sudo ln -sf /opt/kevward/bin/kevward /usr/local/bin/kevward

Supported services

Any service not installed is silently skipped. Adding another is one file — see CONTRIBUTING.md.

Usage

kevward check                 # report findings, change nothing (default)
kevward check -s nginx -s php # limit to specific services
kevward trends                # actively-exploited CVEs relevant to this host
kevward report --trends       # write an HTML posture + attacker-IP report
kevward apply                 # DRY RUN: show what would be patched
sudo kevward apply --yes      # actually apply security updates
sudo kevward apply --yes --minor --reboot   # +minor upgrades, +schedule reboot
sudo kevward schedule-reboot --window 04:00
kevward list-plugins

Safety model

• Read-only by default. check, report, trends never change anything.
• apply is explicit. Without --yes it is a dry run. Security updates only; minor upgrades need --minor or policy.
• Reboots are double-gated. They happen only when allow_reboot = true and a reboot is requested (--reboot / schedule-reboot).
• Risky services are report-only. Composer/Laravel, Node.js and WordPress are audited but never auto-updated — a dependency bump is the app owner's call, not a cron job's.

Configuration

Copy config.example.toml to /etc/kevward/config.toml. All defaults are conservative; see that file for every option, including where to point the Composer/Laravel/Node/WordPress scanners.

Scheduling

Install the units in systemd/:

sudo cp systemd/kevward-report.* /etc/systemd/system/
sudo systemctl enable --now kevward-report.timer    # daily read-only report
# Only after you trust it:
sudo cp systemd/kevward-apply.* /etc/systemd/system/
sudo systemctl enable --now kevward-apply.timer      # weekly security patching

Adding a service

Drop one file in kevward/plugins/ — it is auto-discovered. See CONTRIBUTING.md for the 5-minute guide.

Security

Found a vulnerability in kevward? Please report it privately — see SECURITY.md. Don't open a public issue for security problems.

Acknowledgments

The initial release was designed and written in pair-programming sessions with Claude (Anthropic's AI assistant). This is not an endorsement or an official Anthropic project — just a thank-you for the help. All design decisions and responsibility for the code rest with the maintainer.

License

AGPL-3.0-or-later. See LICENSE.

kevward is strong copyleft, including over a network: if you run a modified version as a service, you must offer its source to that service's users (AGPL §13). Copyright © 2026 Forex Robotics Co., Ltd. (Forex Robotics 株式会社); contributions are accepted under a CLA so the project can be relicensed in future if the maintainer chooses (see CONTRIBUTING.md).